ef core multiple update code example
Example: update multiple records with entity framework
using (var dbcontext = new MyModel()){
var matchedRecords = dbcontext.DummyTable.Where(e => e.code.Equals(entry.code) && e.isValid.Equals(true)).ToList();
matchedRecords.ForEach(e => e.isValid = false);
dbcontext.SaveChanges();
}